Dodge Sprinter 2006 Manual page 1772

21 - 34 AUTOMA TIC TRANSMISSION NAG1 - SERVICE INFORMA TION
2-1 Shift - First Gear Engaged
1 - 1-2/4-5 SHIFT SOLENOID
2 - 1-2/4-5 OVERLAP VALVE
3 - 1-2/4-5 SHIFT PRESSURE SHIFT VALVE
4 - 1-2/4-5 HOLDING PRESSURE SHIFT VALVE
Aft er t h e gea r ch a n ge is com plet e, t h e 1-2/4-5 sh ift
solen oid (1) (F ig. 22) is t u r n ed off. Th is r edu ces t h e
pr essu r e on t h e en d fa ce of t h e 1-2/4-5 com m a n d
Fig. 22 First Gear Engaged
5 - 1-2/4-5 COMMAND VALVE
6 - DRIVING CLUTCH K1
7 - HOLDING CLUTCH B1
8 - SHIFT PRESSURE REGULATOR VALVE
va lve (5) t o 0 psi a n d t h e spr in g pr essu r e down sh ift s
t h e va lve t o it s in it ia l posit ion . Th e lin e pr essu r e
(p-A) is swit ch ed t o t h e h oldin g clu t ch B1 (7) a n d t h e
VA